Consider two different implementations of the same ISA. The instructions can be divided into four different classes according to their CPI (classes A, B, C, and D). P1 has a clock rate of 2.5 GHz and CPIs of 1, 2, 3, and 3. P2 has a clock rate of 3.0 GHz and CPIs of 2, 2, 2, and 2.

Given a program with a dynamic instruction count of 1 x 10⁶ instructions divided into classes as follows:

10% class A, 40% class B, 30% class C, and 20% class D

Which is faster: P1 or P2?